GroupBy Filter in AngularJS

I have an array of timeline which I want to divide in groups per date (dd/MM/YYYY). I was trying make my own "groupBy" without any library (which I really prefer), but I got no success. So I decided to search for a library that does it and I found this: angular-filter, so now I'm trying to use it.

The problem is that I can't figure out what I'm doing wrong, I followed this example and created my JS Bin to ilustrate my situation. It always says the format date is wrong, why?

Filters in Angular are called many times, not just once. So during the first digest, your created_at values are converted to D/M/Y format. Then, when during the next digest Angular call your filters again, it tries to create a date with already converted value (i.e. new Date('18/06/2016')). So you get an Invalid date as a result.

The solution is to convert the dates once in the controller before assigning them to the view and omit the map: ... filter.